//
// Created by 11510 on 2024/6/20.
//
#include <iostream>
#include <string>
#include <cstring>
using namespace std;


template <class T1,class T2 = double,int kBase = 10>
T1 multiply(T2 t1, T2 t2){
    return t1 * t2 * kBase;
}

void test0(){
    double a = 1.2, b = 1.2;
//    cout << multiply(a, b) << endl;   error
}

int main(){
    test0();

    return 0;
}